Description of problem:
Under specific circumstances it is not possible to open an audit log produced by the engine. This circumstances for example includes Rule Task used in the BPMN process.

Version-Release number of selected component (if applicable):
all bpm versions

How reproducible:
always

Steps to Reproduce:
1. Use reproducer attached and execute AuditLogBug test class
2. This will producer several log files
3. It is possible to import audit_success == rule task wasn't used
4. It is not possible to import audit_fail log == rule task was used

Actual results:
It is not possible to open audit log under specific circumstances,ths specific circumstance seems to be caused by the rule task presense

Expected results:

It is possible to create any audit log which was produced by the engine (especially if the process execution was ended successfully)

Additional info:

JBDS produced logging when I attempted to open this 'corrupted' audit log.
This log is attached.